Sand-blast regulator.



' 'No. 791,176.. PATENTED MAY so, 1905.

F. W. BREIDSTER. SAND BLAST REGULATOR.

APILIOATICHv FILED SEPT. 16, 1903.

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j I P 0 WITNESSES. N VEN TOR. 6 %L///W qwfiwf MWM I A TTORNE Y5 No.791,176. I I PATENTED MAYSO, 1905.

W. 'BREIDSTER.

SAND BLAST REGULATOR. APPLIUATION FILED SBPT.16,.1 '9- 03.

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WITNESSES.

A TTORNE m UNITED STATES Patented May S0, 1905 PATENT OFFICE.

FRED W. BREIDS'TER, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO JOSEPH SHAVER,OF MILWAUKEE, WISCONSIN.

SAND-BLAST REGULATOR.

SPECIFICATION formingpart of Letters Patent No. 791,176, dated May 30,1905.

Application filed September 16, 1903. Serial No. 173,401.

To aZZ whom it may concern:

Be it known that I, FRED W. BREIDSTER, a citizen of the United States,residing at Milwaukee, county of Milwaukee, and State of Wisconsin, haveinvented new and useful Improvements in Sand-Blast Regulators, of whichthe following is a specification.

My invention relates to improvements in sand-blast apparatus; and itpertains to the construction of the sand-receiving reservoir, themechanism for controlling the admission of sand to the reservoir, thedevice for screening and spreading the sand as it is deposited in thereservoir, the mechanism for simulta'-' neously controlling theadmission of air both 'above and below the sand in the reservoir, and

the means employed for regulating the escape of sand from the reservoirto the dischargenozzle.

The construction of my invention is explained by reference to theaccompanying drawings, in which Figure 1 represents a vertical sectionthereof. Fig. 2 represents a vertical section of the lower end'of thereservoir drawn at right angles to that shown in Fig. 1. Fig. 3represents a transverse section drawn on line w r of Fig. 1. Fig. 4representsa front view. Fig. 5 is atop View, and Fig. 6 represents across-section drawn on line 3/ y of Fig. 1.

Like parts are identified by the same reference-letters throughout theseveral views.

A represents an air-tight reservoir,in which the sand is storedpreparatory to use. The reservoir A is provided at its upper end withaconcavo-convex air-tight head B, which head is in turn provided withthe inwardly-opening valve O. The valve O is suspended from above thehead B by the valve-stem D and crank-shaft E. The crank-shaft E islocated outside of the reservoir proper and is connected with the valveO through the valveport F by said valve-stem D. The crankshaft E issupported at its respective ends in the vertical walls G of thereservoir, which walls Gr extend above the head B and serve to support asand-receiving receptacle H. The sand-receiving receptacle H is providedwith a screen I, through which refuse matter 1s screened from the sandas it is deposited in the reservoir. The receptacle H may be removedfrom the reservoir when desirous to discharge any refuse mattertherefrom that -may be screened from the sand. The crankshaft E isprovided on one of its protruding ends with an operating-lever J, to theouter end of which is connected a weight'K, which "serves tocounterbalance the valve O and OOH-r necting parts and hold said valvein its closed position. The head B is secured to the walls G of thereservoir bya plurality of rivets M or other equivalent means. The lowerend 'of the reservoir A is provided with a concave bottom or end' pieceN, converging downwardly and outwardly, so that the sand therein willflow of its own gravity toward the center of the reservoir, at whichpoint the escape-valve O is located in the valve-seat P. The valve O isoperated by the crank-shaft Q, with which it is connected by thevalvestem R. Attention is called to the fact that both of thesand-controlling valves O and O are located within the reservoir. andadapted to close with the pressure from within, while the crank-shaftsthrough which they are actuated are both located upon the exterior ofthe reservoir, and motion is communicated from said cranks to saidvalves through their respective valve-seats, whereby both of said valvesare forced toward their seats by internal pressure. The crank-shaft O issupported at its respective ends from the walls of the reservoir-base S,as shown in Fig. 2, and both of said crankshafts are provided upon theirlower sides with strengthening-flanges T. The crank-shaft Q is providedwith an actuatingleverU, which lever is connected at its lower ends toone of the protruding ends of said shaft, while the upper end of saidlever U is retained at any desirable point of adjustment by the rack-barV. The bar Vis provided with a plurality of notches or recesses W forthe reception of a vertical retainingflange A.

The valve-seat P is formed in connection with a sand-receiving chamberB, which chamber is secured to the bottom of the reservoir A. ThechamberP is connected on one side with an air-inlet duct'D and upon itsopposite side with an air-outlet duct E. The air-inlet duct D isconnected with an air-reservoir or source of supply (not shown) and isprovided with an air-controlling hand-valve F.

G is a branch air-duct communicating from the duct E to the reservoir Aabove the sand therein.

The duct E is provided with a hose connection I J represents the hose,and K the nozzle through which the sand is conducted from the reservoirA under pressure to the place of discharge.

The chamber B is provided with a stufiingbox L, through which thevalve-stem operates. The lower end of the valve-stem R is provided witha U-shaped bearing M for the reception of the crank N of the lowercrankshaft. The base S is preferably made flaring at its lower end andis connected at its upper end to the reservoir A by a plurality ofrivets or screws 0.

P is a hand-opening or screw-threaded aperture, through which theinterior of the reservoir may be reached when desirous to stir up thesand in case it becomes clogged above the outlet-valve. The aperture Pis provided with a screw-threaded plug or stopper Q, by

which it is closed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a sand-blast apparatus, the combination of an air-tight reservoirprovided at its respective ends with permanently-affixed concavo-convexheads converging downwardly at their centers; sand-controlling valvescentrally located in both of said heads; a removable sand-reeeivingreceptacle located above the upper head; a screen located in saidremovable receptacle; a sand-receiving chamber located below the lowerhead; one of said sand-controlling valves being adapted to elose thepassage between said sand-reservoir and said lower sand-receivingchamber; means for operating both of said sand-controlling valvesthrough their seats from the exterior; airducts communicating from thesources of supply with the said sand-reservoir and sand-receivingchamber located below said reservoir and a discharge-duct communicatingfrom said lower sand-receiving chamber with a discharge-nozzle,substantially as set forth.

2. In a sand-blast apparatus the combination of an air-tight reservoirhaving concavoconvex heads converging downwardly at their centers;sand-controlling valves centrally located in said heads within saidsand-reservoir; a horizontally-arranged crank-shaft located above andoutside of the upper head and inlet-valve supported at its respectiveends from the vertical walls of said reservoir; an operating-leverconnected with the protruding end of said crank-shaft; a valve-stemconnected at one end to the cranh 0t said shai t and at its opposite endwith the inlet sandcontrolling valve; a crank-shaft located below theoutlet sand-controlling valve and exterior to the lower head andsupported at its respective ends in the vertical walls of the base ofsaid reservoir; a valve-stem connected at one end to the crank at thecenter of said crank-shaft and at its opposite end with the outletsand-controlling valve; an operatinglever connected at its lower end tosaid last named crank-shaft and means for regulating the movement ofsaid operating-lever; a sandreceiving chamber located below the lowerhead of said sand-reservoi r and provided with a sand-controlling valve;an air-duct communicating from the source of supply both with the sandreceiving chamber below the discharge-valve and with said sand-reservoirand a discharge-duct communicating from the lower sand-receiving chamberwith the discharge-nozzle, substantially as, and for the purposespecified.

3. In a sand-blast apparatus, the combination of an air-tight reservoirhaving concaveconvex heads converging downwardly at their centers;sand-controlling valves centrally located in said heads; a removablesand-receiving receptacle located above the inlet sandcontrolling valveprovided with a screen through which the sand passes preparatory toentering said reservoir; means for operating said inlet and outlet sandcontrolling valves from the exterior through their respectivevalve-seats and means for simultaneously controlling the admission ofair to the sandreservoir and to the sand-chamber from which the sand isdischarged from the sand-reservoir, substantially as, and for thepurpose specified.

4. In a sand-blast apparatus of the class described, the combinationwith the lower end of the sand-reservoir of a supporting-base; acrank-shaft supported at its respective ends to the wall of said base; ahorizontally-arranged duct centrally connected with the discharge-valveand supported at its respective ends in the walls of said base at rightangles to said crank-shaft; an operating-lever rigidly connected at itslower end to the protruding end of said crank-shaft; a rack-bar Vrigidly aflixcd to the vertical walls of said sand-reservoir providedwith notches for the engagement with the upper end of said lever andindex characters to designate the proper place of adjustment of saidlever against said rack-bar, all substantially as, and for the purposespecified.

In testimony whereof I afiix my signature in the presence of twowitnesses.

FRED W. BREIDS'IER.

\Vitnesses:

JAS. B. ERWIN, N. Z. TANGHER.

